package cn.tedu.jdbc.homework;

import cn.tedu.jdbc.DBUtil;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Scanner;

/**
 * @author Justin Parker
 * @author 2024/7/30 下午10:34
 * @version 1.0
 */
/*
    登陆功能
 */
public class JDBCLogin {
    public static void main(String[] args) {
        try(Connection connection = DBUtil.getConnection();) {

            Scanner scanner = new Scanner(System.in);
            System.out.println("请输入用户名：");
            String username = scanner.nextLine();
            System.out.println("请输入密码：");
            String password = scanner.nextLine();
            //定义预编译SQL语句
            String sql ="select nickname from userinfo where username = ? and password = ?";
            PreparedStatement ps = connection.prepareStatement(sql);
            ps.setString(1,username);
            ps.setString(2,password);
            ResultSet resultSet = ps.executeQuery();
            if (resultSet.next()){
                System.out.println("登陆成功！");
                System.out.println("欢迎您："+resultSet.getString("nickname"));
            }else {
                System.out.println("登陆失败,用户名或密码错误！");
            }
        } catch (SQLException e) {
            throw new RuntimeException(e);
        }

    }
}
